package day04;

import java.util.Scanner;

public class day_401 {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("请输入月份：");
        int month=input.nextInt();
        switch (month){
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                System.out.println(month+"月有31天");
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                System.out.println(month+"月有30天");
                break;
            case 2:
                System.out.println("请输入年份：");
                int year=input.nextInt();
                if (year%4==0&&year%100!=0||year%400==0){
                    System.out.println(month+"月有29天");
                }else {
                    System.out.println(month+"月有28天");
                }

                break;
            default:
                System.out.println("月份输入错误！");
        }

    }
}
